Cherry Hills Interchange US 89 and SR 273 Farmington, Utah Back to Project List Vibratory Ground Improvement Dry bottom feed stone column work continued through adverse weather conditions at the Cherry Hills Interchange. Project Overview: The total reconstruction of the interchange included vehicular and pedestrian overpasses, Mechanically Stabilized Earth walls and roadway embankments. The unconsolidated Salt Lake deposits consisted of interbedded sand, silt and clay soils. The project site was located in a Seismic Zone 3, having a design earthquake of M7.4 and a peak ground acceleration (Amax) of 0.6g. Layne GeoConstruction installed vibratory stone columns to increase the cyclic shear resistance of the unconsolidated valley deposits prior to the construction of the overpass approach embankments and center support of the overpass. A total of 31,000 feet of vibro-replacement stone columns were successfully installed using the dry bottom feed method for the project.     Value of Work Performed: $500,000 Project Duration: 3 months (2 phases) Project Completion Date: May 2000 Project Reference: General Contractor: Meadow Valley Contractors, Inc. Robert Jones (801) 447-8554